Telegraph instrument.



H. A. EMRIGKQ TELEGRAPH INSTRUMENT.

APPLICATION FILED AUG. 1. 1913.

1, 124, 1 19. Patented Jan. 5, 1915.

2 SHBETSSHEET 1.

THE NORRIS PETERS CO. PHOTO-LITHQ, WASHINGTON, D. C

H. A. EMRIGK.

TELEGRAPH INSTRUMENT. APPLICATION FILED AUG. 1. 1913.

Patented Jan. 5, 1915.

SHEET 2.

2 SHBETS-' wi lmeoozo HE NORRIS PETERS 60., PHOTo-LlTHn., WASH/N010, u r

IINITD STATES PATENT FFIQE.

HARRY A. EMBIGK, F CASEY, ILLINOIS.

TELEGRAPH INSTRUMENT.

Application filed August 1, 1913.

To all whom it may concern Be it known that I, HARRY A. EMRICH, a citizen of the United States, residing at Casey, in the county of Clark and State of Illinois, have invented new and useful Improvements in Telegraph Instruments, of which the following is a specification.

This invention relates to improvements in telegraph transmitters or sending devices and has particular application to an attachment in the form of an auxiliary or supplemental key for such devices.

In carrying out the present invention, it is my purpose to provide an auxiliary or F supplemental key for use in conjunction with the usual key of the telegraph transmitter and which will be so disposed with respect to the ordinary key as to be under the complete control of the operator so that he may change from one key to the other as conditions warrant.

It is also my purpose to provide an auXil iary or supplemental key for telcghaph transmitters, whereby dots may be rapidly sent or transmitted and the energy required, on the part of the operator, in the sending of the dots, reduced to a minimum.

Furthermore, I aim to provide a supplemental or auxiliary key of the class described which will be connected in the same circuit with the main key and embody a vibratory contact, the main key being employed for the sending of dashes only, while the supplemental key functions as the dot sending key.

A further object of the invention is the provision of an auxiliary or supplemental key for use in conjunction with the main key of a telegraph transmitter and which may be readily applied to any instrument now in use and quickly and conveniently connected in the circuit with the main key.

With the above and other objects in veiw, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claim.

In the accompanying drawings: Figure 1 is a view in side elevation of a telegraph transmitter constructed in accordance with my present invention. Fig. 2 is a top plan view thereof. Fig. 3 is a bottom plan view through the instrument. Fig. 4 is a cross sectional view through the same. Fig. 5 is an enlarged perspective view of the auxiliary key removed from the instrument.

Specification of Letters Patent.

Patented Jan. 5, 1915.

SeriaI No. 782,481.

Referring now to the accompanying drawings in detail, the numeral 1 designates a base upon which is mounted the Morse key 2 composed of posts 3, 3 uprising from the base 1 and spaced apart transversely thereof, the upper ends of the posts being provided with alining adjustable bearings 4, 4 within which are mounted the trunnions 5, 5 proecting outwardly from the opposite side edges of a key lever 6 carrying at one end a finger piece 7 and at its opposite end an adjustable stop screw 8, a coiled expansion spring 9 being interposed between the under surface of the key lever 6 and the base between the finger piece 7 and the pivot or fulcrum of the lever, such spring holding the lever in normal position and restoring the same to such position after operation. Mounted upon the base 1 are binding posts 10, 11, the post 10 being electrically connected with the base, while the post 11 is insulated therefrom. Depending from the under surface of the key lever adjacent to the linger piece is a contact 12, while fastened to the base below the key lever and disposed in the path of movement of the contact 12 is a fixed contact 13 connected with the binding post 11 by means of a metal strip 14 arranged upon the under surface of the base. 15 designates a switch by means of which the key may be cut into and out of the circuit as is readily understood by those skilled in the art. In practice, the key lever is alternately depressed and released whereby the circuit is made and broken at the contacts 12 and 18, current flowing into the base from the binding post 10, through the posts 3, 3 and the key lever and then through the contacts 12 and 13, the strip 14 and the bind ing post 11.

In accordance with my present invention, I employ a supplemental or auxiliary key in addition to the key 2 and, in the present instance, this auxiliary or supplemental key comprises a key lever 16 passed through an opening 17 formed in the standard 18 uprising from the base 1 immediately adjacent to the key lever 6 and suitably connected to such base. The key lever 16 is disposed to one side of the key lever 5 and in parallelism therewith and has one end equipped with a finger piece 19 disposed in proximity to the finger piece 7 so that both key flat spring 20 to which is fastened a shank 21 carrying a curved leaf spring 22 provided with a contact 23. Slidably mounted upon the shank 21 is a weight at by means of which the vibrating of the shank under the action of the key lever and the spring may be readily adjusted. Sui-mounting the contact 23 is a fixed contact 25 carried by the horizontal arm 26 fixed upon one end of a standard 27 uprising from the base 1 adjacent to the path of movement or" the key lever of the auxiliary key. The standard 27 is insulated from the base 1 and is electrically connected with the binding post 28 secured to the under side of the base and insulated therefrom, the binding post 28 being electrically connected with the binding post 11 by means of a metallic strip 29. In operation, the key 2 is employed for the sending of dashes only while the auxiliary or supplemental key is brought into service when it is desired to transmit dots and when the finger piece of the auxiliary key lever is depressed, the key lever 16 swings in a vertical path and through the medium of the spring 20 vibrates the shank 21 whereby the contact 23 is moved into and out of engagement with the fixed contact Thus, a series of dots may he sent over the line upon each depression or manipulation of the auxiliary key lever. In the operation of the auxiliary key lever, the current flows from the binding post 10, through the standard 18, key lever 16, spring 20, contact spring 22, contact 23, contact 25, arm 26, standard 27 and thence back to the other side of the circuit by way of the binding post 28, strip 29 and binding post 11.

Fixed to the base 1 adjacent to the free end of the shank 21 and disposed in the path of movement of the latter is an adjustable stop 30 whereby the vibrating contact will be brought to rest after the auxiliary key lever is released.

From the foregoing description taken in connection with the accompanying drawings, the construction, mode of operation and manner of employing my invention will be readily apparent.

It will be seen that I have provided a telegraph instrument wherein by means of individual keys dots and dashes may be transmitted. Furthermore, it will be seen that I have provided an auxiliary or supplemental key which may be readily and conveniently applied to and connected in the same circuit with the usual Morse key.

I claim:

The combination with a telegraph key, of a supplemental key connected across the circuit of the first key and comprising a key lever adapted for vertical swinging movement and disposed in parallelism with the key lever of said first key, means for pivotally supporting said lever, a spring attached to one end of said lever, a shank fastened to said spring and adapted to vibrate in the manipulation of the key lever, means for controlling the vibration of said shank, a contact carried on the upper side of said shank, said contact comprising a curved spring, one end of said spring being rigidly fastened to the shank, the other end thereof carrying the contact point, a stationary contact and a bracket carrying said stationary contact, said bracket comprising a vertical member attached to the base and a hori- Zontal offset disposed over the key.

In testimony whereof I my signature in presence of two witnesses.

HARRY A. EMRICK.

Witnesses C. R.'FORAKER, O. B. WILLIAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). 0." 

